Article C5.22
Oil and Coolant Systems
Technical Regulations
Article C5.22
Oil and Coolant Systems
Chapter: C5
In Simple Terms
F1 cars must have a special safety valve on their oil and coolant tanks that automatically releases pressure if it gets too high (above 3.75 bar). This prevents the tanks from bursting due to extreme heat and pressure during racing. The valve must be approved by the FIA and meet specific technical standards.
- Header tanks must have an FIA-approved pressure relief valve
- Maximum pressure setting is 3.75 barG (bar gauge)
- Valve prevents tank rupture from excessive heat and pressure
- Technical specifications found in FIA document FIA-F1-DOC-C055
Official FIA Text
Any header tank used on the car must be fitted with an FIA approved pressure relief valve which is set to a maximum of 3.75 barG, details of the relief valve may be found in the document FIA-F1-DOC-C055.
pressure relief valveheader tankoil systemcoolant system3.75 bar
2026 Season Regulations